Electric boiler



O. E. SAW.

ELECTRIC BOILER.

APPLICATION FILED APR.23| I918.

1,309,697. Eatenwi 5311]] 15, 1919,

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ELECTRIC BOILER.

APPLICATION FILED APR. 23. 1918.

Pmrcea July 15, 1919.

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APPLICATION FILED APR-23.1918.

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ELECTRIC BOILER.

- APPLICATION FILED APR.23. I918.

1,309,697, Patented July 15, 1919. f 4 SHEETS-SHEET 4.

p I J9 ORA E. SABR, F SANDUSKY, OHIO.

ELECTRIC BOILER.

Specification of Letters Patent.

Patented July 15, 1919.

Application filed April 23, 1918. Serial No. 280,299.

To all whom it may concern:

' heating elements.

Be it known that I, ORA E. SARR, a citizen of the United States, residing at Sandusky, in the county of Erie and State of Ohio, have invented a new and useful Electrio Boiler, of which the following is a specification. I

The present invention relates to an electrically heated boiler such as is used in conjunction with an engine, bine, or for steam heating purposes, and is applicable to any size and style boiler to whatever use or purpose it may be put.

A main object of the invention is the provision of electrical heating elements in conjunction with' a boiler. 1

Another object of the invention is the provision. of heating elements within a;

boiler which will occup a large proportion of the space within the iler.

A still further object of the invention is the provision of means for incasing the Another object within the contemplation of the invention is the provision of means for insulating the plates from their casings.

The invention also contemplates generally improving the construction and enhancing the utility of electrically heated boilers.

With the foregoing and other objects in view which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed can be made within the scope of what is claimed without departing from the spirit of the invention.

A practical embodiment of the invention is shown in the accompanying drawings, wherein.

' Figure 1 is a view in longitudinal section of an ordinary horizontal boiler constructed in accordance with the invention;

Fig. 2 is a crosssection of the same, the heating elements being in elevation with portions in section;

Fig. 3 is a view in side elevation of one form of heating element or plate, the near side'of the casing being cut away; I

Fig. 4 is a cross section of the same;

Fig. 5 is an enlarged detail view partly in elevation and partly in section of the electrical connection;

locomotive, tur- Fig. 6 is a view in perspective of a modified form of heating element, a portion being broken away; Fig. 7 is a central transverse section of the same;

Figs. 8, 9, 10, 11 and 12 are .diagrammatic views showing different forms of wiring.

In the exterior firing of boilers, which is the most usual way of heatin them, great njury is often done the boifir shell and, even though great carebe exercised, the material of the shell must deteriorate under the action of the fire and the gases rising therefrom.

By utilizing the electrical heating method and suspending the heating elements within the boiler and in contact with'the water the resultant injury to the boiler shell is reduced to a minimum.

The heater is adapted for ready installation in any style boiler, whether the same be new or an old used boiler, and new liie will be added to an old boiler by the installation of this heater because subsequent injury to the boiler, due to external firing, will be eliminated.

Referring to the drawings by numerals a dome. The boiler may also be formed with an inlet 12 and an outlet or drain cook 13. One head of the boiler is formed with a boss 14 which is apertured and countersunk to receive an insulating block 16, which is riveted or otherwise secured within the counter sunk portion of the aperture. Leads 16 pass through the insulating block 15 and to these are connected the exterior circuit wires or cables 17, in which circuit is interposed opening and closing the circuit. The interior circuit wires 19 are secured to the inner terminals of the leads 16 for the purpose of conveying current to the heating elements.

Supporting bars 20 extend transversely of the interior of the boiler, to the shell of which they are secured in any suitable manner, and these bars are provided with a series of hangers spaced longitudinally therea switch 18 for the purpose of.

of, and herein shown as hooks 21. Dependring from the hooks 21 are the insulating hangers 22 from which are suspended plates or heating elements indicated generally by the numeral 23.

The plates 23 are formed of sheets 24 of suitable material offering sufficient resistance to the passage of an electrical current to cause them to become heated and so communicate heat to the water within the boiler, in which they are partially immersed. The number of these plates will vary with the size of the boiler and with the conditions under which the boiler is to work and it is contemplated using sufficient plates to take up considerable of the space within the boiler and so diminish the liquid contents of the boiler.

While the plates 24 are herein shown as inclosed in casings 25, it is to be understood that the plates may be installed without these casings when so desired, the plates having the same effect as heating elements with or without the casings.

The casings 25 are formed or sheet metal, preferably copper or galvanized iron, and are formed about the plates 2% completely inclosing the plates and their hangers or connectors 22. These casings serve to protect the plates 2% from the action of the water within the boiler and hence greatly enhance the efiiciency of the plates. The upper edge of each casing 25 has castings or bosses 26 riveted or otherwise secured thereon, and these bosses are centrally apertured to permit the passage therethrough ofthe interior circuit wires 19, which have electrical connection, as indicated by the numeral 27, with the plates 24. 1-; consideration of F ig. 5 will render it apparent that the insulation of the wires 19 fits closely within and packs the apertures in the bosses 26 so that steam or water may not enter within the casing.

lVhen desired, strips er asbestos 28 may be placed on the plates 2% and separate the plates from the casings, as seen most clearly in Figs. 3 and These asbestos strips are preferably of narrow width and are spaced apart and arranged longitudinally and transversely of the plates. These strips, as will be understood, serve to keep the plates insulated from the casings.

In Figs. 6 and 7 a modified form of plate is shown, which is constructed of side plates 29, riveted or otherwise secured to the flanges 30 which extend outwardly from the peripheries of the rectangular frame 31, thus forming a hollow rectangular plate. In order that the plate so constructed may be properly braced, crossed I-bars 32 are located within the plates and serve to protect the plate from strains tending to crush it. This plate has eyes 33 riveted or otherwise secured thereto to provide a means for hanging the plate.

It will be understood that the plate shown in Figs. 6 and 7 may also be inclosed in suitable sheet metal casing the same as the plates 24 hereinbefore described, if so desired.

The exterior wires or cables 17 are connected to anysuitable source of electrical supply, not shown, for the purpose of conducting current to the cables 19 and plates 24. The plates 24 may be connected in circuit in a number of different ways, the principal ways in which it is desired to connect them being shown in Figs. 8 to 12, inclusive.

In Fig. 8 the cables 19 are shown as divided into a number of branch circuits equal to the number of plates, and each plate is connected to form a part of one of these branch circuits.

In Fig. 9 is shown another form of con nection wherein the cables 19 are divided to form two branch circuits and half the plates are connected in one branch while the other half of the plates is connected in the second branch. In this instance the plates within a branch are so connected that the current in adjoining plates flows in opposite direc tions.

By the connection shown in Fig. 10 the current flows through the plates in succession, the current entering the plate at one side of the boiler and leaving the plate at the opposite side. The plates are so connected that the current will flow in opposite directions in adjoining plates.

In Fig. 11 is shown a method of connecting or wiring the plates wherein the cables 19 are divided into branch circuits equal to half the number of plates. Two plates are joined in each branch circuit, and the plates in a circuit are so connected that current flows in opposite directions in the plates.

ln Fig. 12 is shown another method of wiring the plates wherein the cables 19 are divided into branch circuits equal to half the number of plates. The plates are so joined that current flows in one direction in all the plates at one side of the boiler, while current flows in the opposite direction in all the plates at the other side of the boiler.-

, aving thus described the invention, what is claimed as new and sought by Letters Patent, 1s

1. A steam generator including a shell, insulating hangers mounted therein, and

heating elements supported by the hangers and spaced apart, each element including a casing. a plate within the casing adapted to be heated by an electric current directed thereto, and -dielectric means interposed between the plate and casing for spacing them apart, means connected to the plate for conducting electric current thereto, the current passing 1n one direction through some of the plates and in the opposite direction through the remaining plates.

2. In adevice of the class described, the I combination with a shell, and insulating hangers therein, of a plurality of s aced heating elements suspended from the angers and within the shell, each element includinga casing, a heating late within the casing and s aced there rom, dielectric means for holding each plate out of contact with its casing, each of said plates including a frame and side plates secured to theframe to form a hollow member, said framehaving intermediate crossed bars constituting braces, and means for conducting electrical currents to the plates, saidcurrents passing through the plates of some of the heating 15 v ORA. E.-SARR.' Witnesses I I H. L. PEEKE, Main A. WONNEL.

hereto afiixed my signa- 20 ture in the presence of two witnesses. 

